Stop mechanism for looms



T. F. FINN.

STOP MECHANISM FOR LOOMS.

APPLICATION FILED MAY 29. I920.

Patelited Sept. 28,1920.

THOMAS E. FINN, or NORTH n vnovnn, MAssAoHUsnrrrs.

s'ro-r MECHANISM non LOOMS.

Specification of Letters Patent. I

, Application filed May 29, 1920. Serial No. 385,330.

To all whom it may concern:

Be it known that I, THOMAS F. FINN, a citizen of the United States,residing at North Andover, in the county of Essex and State ofMassachusetts, have invented new and useful Improvements in StopMechanism for Looms, of which the following is a specification.

This invention relates to a stop motion for looms. V

The object of the invention is to provide a simple mechanism forautomatically stopping a loom in the event' that the filling threadbreaks or becomes exhausted.

The invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out in theclaims thereof.

Referring to the drawings: 1

Figure 1 represents aside elevation of a portion of a loom, the laybeing shown in section, my improved stop mechanism being embodiedtherein.

Fig. 2 is a plan View of a portion of the mechanism, the breast beambeing broken away to save space in the drawings and to enable both endsof the release rod to be illustrated.

Fig. 3 is a detail front elevation of the release rod.

Fig. 4 is a detail section taken on the line 4-4, of Fig. 2.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 5 represents one of the side frames of a loom, 6 thebreast beam and 7 the lay. Fast tofthe breast beam 6 midway of said beamis a bracket 8 which is provided with arms 9 andlO, and to the arm 9 isadjustably fastened by a bolt 11 a cam 12. Fastto the arm 10 is a stud13 upon which is. pivotally mounted a tumbler 14, which is normally heldby a spr1ng l5 in the position illustrated in Fig. 1, at whlch time anend 16 thereof abuts against a stop 17 provided upon the arm 9, and aportion of said end 16 projects above a topedge 18 of the arm 9. Thespring 15 is coiled around the stud '13 and one end ofsaid springcontacts with a projection 19 upon the tumbler 14 while the other endprojects into a collar 20 which is adjustablymounted upon the. stud 13.v

Fast to lay 7 is ,a bracket-21 which 1s pro" vided with ears 22 betweenwhich'is mount-- ed upon a shaft 23 a rocking member 24 to which aresecured a plurality of feeler wires 25. The feeler wires 25 projectabove a groove 26 provided in the upper surface of the lay. Fast to theshaft 23 is an arm 27 which is connected by a rod 28 with a daggersocket 29 pivoted'at 30 to a portion of the bracket 21. .A dagger 31 issecured to the socket 29 and is bent toproject over the arm 9 and cam12. A'spring 32' acts to hold the dagger 31 upon the cam 12 and tends tocause the dagger to follow the v curve of the" cam as the layoscillates.

In stopping the operatlon of the loom, it

is necessary to disconnect the friction driv- Patented se t. as, 1,920.

mg members which transmit the power and 7 also operate a band brakemechanism thereby stopping the momentum of the loom.

Fast to a shaft 33 which extends between the side frames 5 of the loomis a shipper handle 34 which has'fo'rmed integral therewith at itslower'endan arm 35 from which projects a pin 36 which engages'a lever 37pivoted at 38 to the frame'5. The lower end of the lever 37 has ashipper rod 39 attached thereto, the said shi'pper'rod'being connectedwith the movable member of the friction driving mechanism notillustrated in the drawings-but well known to those skilled in the art.

The band brake also not illustrated in the drawings is operated by themovement,

of a foot treadle 40, the forward end ofwhich is illustrated in Fig. 1.Attached-to the foot treadle40 at 41 is a treadle rod 42 which has alocking member 43 attached to its upper end, the said locking memberconstituting a part of said treadle rod and projecting through aslotprovided in a guiding member 44 fastened to theframe 5 of the loom. 'Aspring 45, the tension of which may be adjusted by a movable collar 46,rests on a bracket '47 fastened to the frame 5 of the loom, and tends tokeep the foot treadle 40 in a raised position, at which time thefriction band is held tight around 1 means of a key 48'which projectsinto a notch 49 provided'in the locking. member 43' as illustrated inFig.4. A flat spring ,50 atthebrake wheel. When the foot treadle 40 istached to the upper end of the treadle rod 42 contacts with the rear ofthe guide mem ber 44 when the locking member 43 is lowered and pressesthe latter forward so that the jar of the loom will not allow thetreadle rod to become accidentally disengaged and the brake appliedwhile the loom is running. Fast to the treadle rod 42 is a knockoff cam51 which is so positioned that when the treadle rod 42 is released itwill hit the lower end of the arm 35 of the shipper handle 34 which isthen in the position illustrated in dotted lines, Fig. 1, therebyreleasing said handle and thus shutting off the power.

All of the mechanism thus far described is old and Well known in theart, being a portion of the equipment of the Knowles loom. The novelfeature of this invention lies in the mechanism which is provided forreleasing the locking member 43 from the key 48 and therebysimultaneously applying the band brake and operating the shipper handleto disconnect the power. This mechanism is as follows :Extendinglongitudie nally of the breast beam 6 from a point approximately midwayits length to a point adjacent to the treadle rod 42 is a release rod 52which is supported-in a plurality of bearings 53 which are attached tothe breast beam 6. The outer end of the release rod 52 is bent upwardlyat 54 and said upturned end is located directly in front of the upperend of the locking member 43. The inner end of the release rod 52 isbent downwardly at 55 and is again bent to terminate in a short portion56 which is parallel to the main portion of the rod.

The portion 56 has a rod 57 attached.

thereto which has screw-threaded engagement with a member 58 which inturn issecured to the tumbler 14 at 59; By removing the member 58 fromthe tumbler l4 and turning said member upon the rod 57, the

end 54 of the release rod 52 may be correctly positioned relatively tothe locking member 43. When the tumbler 14 is engaged by the dagger 31causing the tumbler to be rocked upon the stud 13, a rocking movement isimparted to the release rod 52 and the end 54 thereof is caused toengage the upper end of the locking member 43 and force said member outof engagement with the key 48.

The general operation of my improved stop motion is as follows: Instarting the loom the foot treadle 40 is pressed downwardly, therebyreleasing the hand brake.

- The foot treadle 40 is held in its lowermost to throw on the power.Each time that the lay 7 moves back from the fell of the cloth, or inother words, away from the breast beam 6, the dagger 31 contacts withthe cam 12 and acts to lift the dagger socket 29 and thereby raise thefeeler wires 25 to a sufficient height for the shuttle to passtherebeneath and deposit the filling thread between the warp threads ina manner well known to those skilled in the art.

When the lay 7 again beats up or moves toward the breast beam 6 thefeeler wires 25 will swing downwardly as the dagger 31 moves over thesurface of the cam 12, and if the filling thread is unbroken between thewarp threads, the feeler wires 25 will be supported by said fillingthread above the groove 26 and will hold the dagger 31 above and out ofcontact with the end 16 of the tumbler 14. If, however, the fillingthread is broken or has become exhausted in the shuttle, as the lay 7beats up, the feeler of engagement with the key 48. The treadle rod 42being thus released will be forced upwardly by the spring 45 therebypulling the foot treadle 4O upwardly and applying the brake mechanism.During the upward movement of the treadle rod 42 the knockoff cam 51will engage the lower end of the arm of the shipper handle 34 therebyforcing the said shipper handle from the position illustrated in dottedlines, Fig. -1 to the position illustrated in full lines, and therebyshutting off the I claim:

1. A stop motion for looms embodying therein a shipper handle adapted tocontrol the power for the loom, a treadle rod adapted to control abrake, means to lock said treadle rod to hold said brake in a releasedposition, a release rod adapted to engage said treadle rod, a tumbleroperatively connected with said release rod and means controlled by thefilling thread adapted to rock said tumbler and thereby impart a rockingmovement tovsaid release rod, whereupon said treadle rod andshipperhandle will be operated simultaneously to stop the loom.

2. A stop motion for looms embodying therein a shipper handle adapted tocontrol the power for the loom, a treadle rod adapted to control abrake, means, to lock said power.

treadle rod to hold said brake in a released position, a release rod,one end of which is provided with an upwardly extending arm adapted toengage said treadle rod, a tumbler, means connecting said tumbler withsaid release rod and means controlled by the filling thread adapted torock said tumbler and thereby impart a rocking, movement to said releaserod, the upwardly extending arm of said release rod being rocked againstsaid treadle rod to force said treadle rod out of engagement with saidlocking means, whereupon said treadle rod and shipper handle will beoperated simultaneously'to stop the loom. V

3. A stop motion for looms embodying therein a shipper handle adapted tocontrol the power for the loom, a treadle rod adapted to control abrake, means to look said treadle rod to hold said brake in a releasedposition, a release rod, one end of which is provided with an upwardlyextending arm adapted to engage said treadle rod, and the other endthereof provided with a down wardly extending arm, a tumbler, meansconnecting said tumbler wlth said downwardlyextending arm and meanscontrolled by the filling thread adapted to rock said tumbler andthereby impart a rocking move-' ment to said release rod, the upwardlyextending arm of said release rod being rocked" against said treadle rodto force said treadle rod out of engagement with said locking means,whereupon said treadle rod and shipper handle will be operatedsimultaneously to stop the loom.

' 4. A stop motion for looms embodying connecting said tumbler with,said down- Wardly extending arm, means to vary the length of saidconnecting means and thereby position. said upturned arm relatively tosaid treadle rod and means controlled by the filling thread-adapted torock said tumber and thereby impart a rocking movement to said release,rod, the upwardly extending arm of said release rod beingrocked againstsaid treadle'rod to force said treadle rod out of engagement with saidlocking means, whereupon said treadle rod and shipper handle will beoperated simultaneously to stop the loom. I I g a In testimony whereof.Ih-ave hereunto-set my hand inpresence oftwo subscribing wit- THOMAS-F. FINN.

Witnesses: I FRANKLIN E. Low,

HERMAN 'R. HOFFMAN.

